From: Ville Syrjälä Date: Thu, 5 Jun 2014 16:15:52 +0000 (+0300) Subject: drm/i915: Don't get hw state from DVO chip unless DVO is enabled X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f417c11b8987245826aa8b2b606ce2f9d5edbd67;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git drm/i915: Don't get hw state from DVO chip unless DVO is enabled Certain DVO chips (ns2501 for example) don't like to be accessed unless the PLL is running. Simply skip the DVO get_hw_state if the DVO port is disabled. Signed-off-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c index a3631c0a5c28..5d7d97522bdc 100644 --- a/drivers/gpu/drm/i915/intel_dvo.c +++ b/drivers/gpu/drm/i915/intel_dvo.c @@ -112,7 +112,15 @@ static struct intel_dvo *intel_attached_dvo(struct drm_connector *connector) static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector) { + struct drm_device *dev = connector->base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; struct intel_dvo *intel_dvo = intel_attached_dvo(&connector->base); + u32 tmp; + + tmp = I915_READ(intel_dvo->dev.dvo_reg); + + if (!(tmp & DVO_ENABLE)) + return false; return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev); }